SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dr-klar.de
SSL/TLS Certificate
SSL/TLS Certificate for dr-klar.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dr-klar.de
- Valid from
- Sep 26, 2026
- Valid until
- Dec 25, 2026 (73 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 0617EC0CFF44036D6C1C10062071967A1C13
- SHA-256 fingerprint
- 0B:53:9D:A4:7A:9C:09:47:4B:05:0F:A5:FE:76:D2:F0:BD:EE:BA:B0:1A:5E:02:59:68:3A:4E:69:51:0A:7F:F7
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 10, 2026.
Never get surprised by dr-klar.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch dr-klar.de continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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